It's hard to find people to follow, even though I'm well-connected to the initial group of users (lots of friends in YC, started using Quora in 2009, etc.).
It's made worse because the Facebook Connect prompt on the homepage shows ~12 friends using the site, but once I log in I can't find them. There should be a word for that. Soup Nazi UX or something. "Here's some soup. NO SOUP FOR YOU."